Construction Method of Reinforced Concrete Multi-span Arch Bridge or Continuous Box Structure Bridge
A technology of reinforced concrete and construction method, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of many longitudinal prestressed cables of continuous box girder structure, limited segment length, slow construction speed, etc. The effect of low cost, lengthened construction section and accelerated construction speed
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Embodiment 1
[0029] see figure 1 , a method for constructing an arch support of a two-span reinforced concrete multi-span arch bridge, the method is carried out in the following steps:
[0030] Step 1) casting the substructure of the double-span arch bridge on the ground 1 according to the traditional process, including the foundation (not shown in the figure), the middle pier 2, and the abutment 3;
[0031] Step 2) Fix one end of the flexible cable 4 at an appropriate position under the elevation of the arch support 5 on the middle pier 2 of the continuous-span arch bridge. In order to ensure the strength of the flexible cable 4, the flexible cable 4 is made of high-strength steel strand or High-strength steel wire rope. The other ends of the flexible cables 4 are respectively fixed on the ground anchors 7 on the left and right banks along the bridge axis direction, and the ground anchors 7 are fixed on the ground 1 inside the corresponding span to balance the installation and constructi...
Embodiment 2
[0038] see figure 2 , is a construction method for the arch support of a three-span reinforced concrete multi-span arch bridge. The difference between this embodiment and Embodiment 1 is that in this method, the number of piers 2 in the bridge is two. The pier group is formed by fixedly connecting the flexible stay cables 4, and the two ends of the pier group along the longitudinal direction of the arch bridge are provided with reversely extending flexible stay cables 4, and the reversely extending flexible stay cables 4 are fixed on the ground 1 through ground anchors 7; step 3 ), set up a group of arch supports 5 between the two middle piers 2. Other technical features of this embodiment are the same as those of Embodiment 1 and will not be repeated here.
Embodiment 3
[0040] A construction method for the arch support of a continuous box structure bridge. The difference between this embodiment and Embodiment 1 and Embodiment 2 is that in step 3) after the installation of the arch support is completed, it is necessary to set up on the arch support the line shape of the longitudinal section of the continuous box structure. Consistent conventional brackets realize the construction of continuous box structures.
[0041] The present invention is not only limited to above-mentioned embodiment, and in the present embodiment, the construction method of reinforced concrete multi-span arch bridge or continuous box structure bridge with more than three spans can also fix the middle pier of the bridge by flexible stay cable 4 by the method in embodiment 1, Thereby, the superstructure of the bridge can be constructed by cast-in-place integral support.
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